### Home > A2C > Chapter 4 > Lesson 4.3.1 > Problem 4-140

4-140.

*y* = 2*x*^{2} − 4*x* + 6

Where is the vertex of *y* = 2(*x* − 1)^{2} + 4? Or *y* = 2*x*^{2} − 4*x* + ?

What are their stretch factors?

Refer to the Math Notes box from Lesson 4.3.2.

See part (c).